Carbureter.



R- M. ROBERTS.

OARBUEETER.

APPLICATION FILED AUG. 29. 1910.

Patented Jan. 9, 1912.

mum: orrion Bonnier M. corners, or summon, INDIANA.

ommmuuisn.

Specification of Eetters Petent. Application filed. August 29, 1910. Serial No. 579,525.

ture into the cylinder oat-the engine in a" dry condition for the sake of economy in fuel and particularly to avoid overheating" the engine, as l have found by experienceis. theiI-usual sparking plug 165' that the more thoroughly the gasolene is vaporized and mixed with air, and the drier the downwerd travel of the iston '12 dis- ;charges through e'pipc 181cc 'ng from the top of. the crankcase .anilkentering the ,cyl

this mixture is the less the tendency to over-' heat the engine will be and greet-er'etliciency in horse power obtained willbe the result. ll accomplish the objects of my invention by the mechanism illustrated in the aceom panying drawing, in which-- Figure 1 is it view in vertical central sec tion of the two-cycle gas engine embodying my improvements. Fig. 2 is a detail in like section of the .carbureting mechanism shown in Fig. l, but on a larger scale, the

View being on the line 2*2 of Fig. 3. Fig:

3 is a. vertical section'on the line 33-of Fig. 2, and Fig. 4 is a. detail in plan viewand horizontal section on the line so of case having the outside breckets'tlto rest upon any suitablesupport or frame and from which the engine and its mechanismare supported. Above the crank case is the vertical cylinder 7 of etwo-cycle explosive engine, the lower end t t-which communicetes with the interior of the crank case through an. opening which is-suflicient for the passage and unobstructed operation of the pitman 8 in the usualmanner.

9 is the engine crank shaft and 10 the crank, within the crank case 5, to which the lower end of the pitman 8 is connected, and the upper end of the pitmun is connected with a pin i1 carried by a piston 12 which operates within the cylinder 7. The cylinder 7 is provided with an. air inlet port 13 positioned so as toadmit air tethecylinderbelow the piston 12 when'the latter is atthe upper end of its stroke in said cylinder. The air thus admitted is forced down and compressed within the crank case 5 by the downward movement of the piston Patented Jan. 9,1912.

12. Above the air inlet poi-"c123, through the wsll of cylinder 7 is an .exhaust'port 14"- which is closed by the piston 12 except when the latter'is at the lower end of itsrt ravel, and vihen that condition of themov'ementof the piston obtains the exhaust port 14 is open for the free escape of the products of combustion accumulated by an explosion ofthe hydro-carbon mixture in the upper end of the cylinder. At'thetop I the cylinder The air compressed In the circuitous-5 by iuder throughthe port 19,1locstedqustabove:

the top. attire pistouwhcn the latter is .at

wurdly 'in a curve as shown, and then lipwu-rdly in a curve thereby formln 18 at the bottom, of'this downward bendisdesired to vepor'me and mix withthe airbeing forced through pipe 12} lay-the compression in crank case o. Loczited. under the down= word bend of the pipe 18, and here shownes' formed integrally therewith, isfe transverse.v cylindrical reservoir 20 which has communicetion with the interior of pipe 18 through a suitable perforation, as shown, and this perforation, is surrounded, on the interior of pipe 18, by a dam or flange 21 which, by projecting up within the bend of pipe 18 as it does, forms a reservoir within said pipe 18 which-williretein the liquid hydrocarbon, preferably -gasolene, in the cavity surrounding the flange 531, of a-depth equal to the height of said flange. The supplyopening through flange 21 will be formed the lowest-point ofits travel; The .pipe 18,

atterit leaves the crank cese,.ex.tends down x a trap the hydro-carbon fuel-supply which it is comically at its upper end into a seat for a structed top wall of the latter, as clearly shown in the drawing, and the size of the are shown as they are both ,well known.

' 27 and :1V tight joint is obtained by packing gasolene. This air current blows the gasotive and satisfactory in practice it is essendischarge Qpening from the cylindrical l reservoir 20 into the pipe 18 will be regulated by the adjustment of the valve 23.

' The gasolene will be supplied to the cylindrical reservoir 20 through a supplypipe 25, byany suitable means as from an elevated tank, or by a pump, neither of which Located at. the opposite end of the cylindrical reservoir 20 is a stand-pipe 26 through which the excess of gasolene in the cylindrical reservoir 20 is carried away from the reservoir and the gasolene maintainhd at a predetermined uniform height in the reservoir 20, which will be regulated by the height of stand-pipe 26 therein. The height of the stand-pipe 26 is readily varied by screwing it in or out of the sleeve-extension 28 and gland 29.

The upstroke of the piston 12 causes a suction t rough pipe 18 which draws the gasolene 'rom reservoir 20 into the pipe 18, and the excess drains back into the said reservoir, but to make this operation efi'ectial to maintain the gasolene level in the reservoir 20 at a proper height.

The force of the current of air discharged through pipe 18 from the crank case 5 is directed against the body of gasolene in the reservoir around flange 21, by means of a gate valve 30. The position of this valve 30 may be varied to re ulatc the size of the air passage through pipe 18, and also to vary the impact of the air current upon the lene into waves and splashes which facilitates its vaporization. This vaporization is also greatly assisted and increased by the presence within the lower bend of the pipe 18 of a series of wire gauze barriers 32. These are introduced by slotting the. walls of the pipe'by saw-ker'ts into which the wire fabric is then introduced and the he] f-: closed with solder. Above the barriers 32 is a woven wire strainer 34 which will preteraloly be conical in shape to increase its area.

By the force of the air, directed by the gate valve 30, the gasolene in the bottom of the lower bend of the pipe 18 is brokc'u into a spray which is beaten into still finer particles against the woven wire barriers 32 by whichit becomes atomized and then oughly mixed with air and therefore comparatively dry, and then it is blown through the strainer 34 which additionally removes any excess moisture, aswell as any improper foreign substances. and thus carburctcd the explosive mixture is delivered into the upper end of the cylinder 7. and at the time of its discharge to the cylinder it is thrown against a flange 36 formed on the top of pisstroke of the piston.

ton 12 thereby stil further atomizing and mixing the hydro-cmhon vapor and air. The upper end of the needle valve 23 has :1

lateral arm 37 which is connected by a bar 38 with an arm 39 on the stem 40 of the gate valve 30. The bar 38 has a rod 49 which extends to any convenient; point for the easy manipulation, and by a longitudinal move ment of the rod 42 both valves 23 and PM will be simultaneously opened or closed which provides a reciprocal control of both gasolcne and air. The vertical edges of thc valve 30 are shown as parallel, (see Fig. 3), and the width of the valve and its shape do not admit of its forming a complete closure in pipe 18.

Having thus fully described my invention, what I claim as new and wish to secure by Letters Patent, is-

1. The combination of a crank, a crankcase, a cylinder opening into said case means for supplying air to the case, a piston connected with said crank and mounted in said cylinder, a conduit connected at one end to the crank- *asc and at the other to the cylinder, said conduit having a U-shapcd bend at its lowest portion and an oil reservoir below said conduit having a discharge opening into the bottom of said U-shapcd bend. a flang extending upwardly within the conduit around said opening to firm a reservoir therein for gasolcuc which is drawn by suction caused by the outward stroke. of the piston and which is blown into the cylinder through said conduit on the compression 9. The combination of a crank, a crankcase. a cylinder opening into said case, means for supplying air to the case. a piston connected with said crank and mounted in said cylinder. a conduit connected at one end to the crankcase and a the other to the cy1- indcr. said conduit: having a U-shapcd bend at its lowest portion and an oil reservoir below said conduit having a discharge opening into the bottom of said U-shapcd bend, a flange extending upwardly within the conduit around said opening to form :1 reservoir therein for Q asolcne which is drawn by suction caused by the outward stroke of the piston and which is blown into the cylinder through said conduit on the compression stroke of the piston, said flange also forming; a seat for a needlewalve, and a nccdlc- 'alvc.

3. The combination of a crank, a crankcase, a. cylinder opening into said case, means for supplying air to the case, a piston connected with said crank and mounted in I said cylinder, a conduit connected at. one end.

to the crank-case and at the other to the cylinder. said conduit having: a U-shapcd bend at its lowest portion and an oil reservoir below said conduit having a discharge openins; into the bottozn of U-SllttDQtl bend, a flange extending upwardly within the conlfitl ima es dugit around said opening to form a reset voir therein for gasolene which is drawn by suction caused by the outward stroke of the piston and which is blown into cylinder through said conduit on the compression stroke of the piston, saidiiange also having a seat for a needle-valve, a ncedle-valvc, and a valve in the conduit between the needlevalve and crank-case to regulate the size of theopening in the conduit.

4;. The combination of a crank, a. crankcase, a cylinder opening into said case, means for supplying air to the case, a piston connected with said crank and mounted in said cylinder, a conduit connectd at one end to the crank-case and at the other to the,

cylinder, said conduit having a- U-shaped bend at its lowest portion and an oil reservoir below said conduit having a discharge.

opening into the bottom of said U-shaped bend, a flange extending upwardly within the conduit around said opening to form a reservoir therein for gasolene which isdrawn by suction caused by the outward stroke of the piston and Whidhis blown into the cylinder through said conduit on the compression stroke of the piston, said flange also having a seat for a needle-valve, a needle-valve, a valve in the conduit between the needle-valve and crank-case to regulate the size oi the opening in the conduit, and perforated barriers in the lower bend of said conduit.

5. The combination of a crank, a crankcase, a cylinder opening into said case, means for supplying air to the case, a piston connected with said crank and mounted in said cylinder, a conduit connected at one end to the crank-case and at the other to the cylin- Llji said conduit having a Ushaped bend at its lowest portion and an oil reservoir below said conduit having a discharge opening into the bottom of said U-ohaped bend, a flange extending upwardly within the conduitaround said opening to form a reservoir therein fon gasolene which is drawn by suction caused by the outward stroke of the j p ton and which is blown into the cylinder rough said conduit on the compression stroke of the piston,said flange also having.

a seat for a needle-valve, a needle-valve, a valve m the conduit between the needlevalve and crank-case toregulate the s1ze of the opening in the conduit, and a strainer in the conduit between said needle-valve and the discharge end of the conduit.

3. The combination of a crank, a crank cum, :1 cylinder opening into said case, means for supplying air to the case, a piston connected with said crank and mounted in said cylinder, a conduit connected at one end .to the crank-case and at the other to the cylinder, said conduit havinga- U-shaped bend at its lowest portion and an 011 reservoir be low said conduit having a discharge opening duit around said opening to form a reser-- voir therein for gasolene which is drawn b suction caused by the outward stroke of the piston and which is blown into the cylinder through said conduit on the compression stroke of the piston, said flange also having a seat for a needle-valve, a needle-valve, a valve in the conduit between the needlevalve and crank-case to regulate the size of the opening in the conduit, perforated barriers in the lower bend of sand conduit, and a strainer in the conduit between said needle-valve and the discharge end of the conduit.

7. The combination of a crank, a crankcase, a cylinder opening into said case, means for supplying air to the case, a piston connected with said crank and mounted in said cylinder, a conduit connected at one end inder, a gasolene reservoir below said con-' duit the contents of which are exposed to suction in the conduit which is caused by the outward stroke of the piston whereby gasolene is supplied to said conduit and is then exposed to air forced through the conduit on the compression stroke of said piston which air takes up the gasolene and discharges it into the cylinder, and means for maintaining the gasolene at a predetermined level in said reservoir.

8, The combination, with an explosive engine, of the two-cycle type comprising a cylinder, iston and a crank case to which air is admitted by the travel of the piston, of a conduit conveying air from. the crank case and discharging it into the explosive chambei of the engine, said conduit having a U- shapcd bend, a gasolene supply opening at the botton'i of said bend, an upward flange within the conduit around-said supply opening forming a reservoir and a seat for a needle valve, a needle valve, 21. gasolene reservoir under said bend below the conduit supplying gasolene to the conduit by Suetion in the latter caused by the outward travel of thepiston, means for maintaining the gasolene at a predetermined level in said last reservoir, a gate-valve between the needle valve-and crank case within said conduit, and means for opening and closing said needle and gate valves.

9. The combination, with an explosive engine, ofthe two-cycle type comprising a cylinder, piston and a crank case to which air-is admitted by the travel of the piston,

of a conduit conveying air from the crank case and discharging itinto the explosive chamber of the engine, said conduit having a U-shaped bend, a gasolene supply openin at the bottom of said bend, an upward flange within the conduit around said supply opening forming a reservoir and a seat for a needle valve, a needle valve, a gesolene reservoir under said bend below the cencluit supplying gas'olene to the conduit by suction in the letter caused by the eutwarcl travel of 5 the piston, means for maintaining the gasolene at a predetermined level in saicl last reservoir, a gate-valve bet-ween the needle valve and crank case within said conduit, means for simultaneously opening and 0105'- 10 ing said needle and gate valves, and permelee-5e forated barriers in. the lower bend. m as; conduit.

In Witness whereof, Ii have lieremiio Fri my hand and seal at Anderson, Indian Luis 20th day of August, A. D. one thousand nine hundred and ten.

ROBERT M. ROBERTS.

Witnesses NM. ROWLAND: MASON M. ROBERTS. 

